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Age-related effects of Ginkgo biloba extract on synaptic plasticity and excitability

Williams, B., Watanabe, C.M.H., Schultz, P.G., Rimbach, G. and Krucker, T. (2004) Age-related effects of Ginkgo biloba extract on synaptic plasticity and excitability. Neurobiology of Aging, 25 (7). pp. 955-962. ISSN 0197-4580

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To link to this item DOI: 10.1016/j.neurobiolaging.2003.10.008

Abstract/Summary

EGb 761 is a standardized extract from the Ginkgo biloba leaf and is purported to improve age-related memory impairment. The acute and chronic effect of EGb 761 on synaptic transmission and plasticity in hippocampal slices from young adult (8-12 weeks) and aged (18-24 months) C57B1/6 mice was tested because hippocampal plasticity is believed to be a key component of memory. Acutely applied EGb 761 significantly increased neuronal excitability in slices from aged mice by reducing the population spike threshold and increased the early phase of long-term potentiation, though there was no effect in slices from young adults. In chronically treated mice fed for 30 days with an EGb 761-supplemented diet, EGb 761 significantly increased the population spike threshold and long-term potentiation in slices from aged animals, but had no effect on slices from young adults. The rapid effects of EGb 761 on plasticity indicate a direct interaction with the glutamatergic system and raise interesting implications with respect to a mechanism explaining its effect on cognitive enhancement in human subjects experiencing dementia. (C) 2003 Elsevier Inc. All rights reserved.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences
ID Code:12847
Uncontrolled Keywords:long-term potentiation, paired-pulse facilitation, Ginkgo, EGb 761, plasticity, dietary, acute, cognitive enhancement, cognition enhancer, learning and memory, LONG-TERM POTENTIATION, HIPPOCAMPAL SLICES, CEREBRAL-ISCHEMIA, CA1, INHIBITION, EGB-761, BRAIN, LTP, DISINHIBITION, MECHANISMS

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